Hi sultan,
Thank you for contacting the Microsoft Community.
I completely understand that you need assistance with your online exam as you encountered an error. We value your time and effort preparing for this exam, so rest assured that I'll provide additional information and verify options to resolve your concern.
Please make sure that the device you're using to take an online exam meets the minimum requirements by checking Microsoft OnVUE exam information // Pearson VUE. You also need a connection speed of 12 Mbps down and 3 Mbps up to ensure optimal performance. Kindly also consider the additional troubleshooting/technical tips below:
Refresh your browser or OnVUE application.
Clear the browser cache and cookies. Allow all third-party cookies.
Turn off the antivirus software and the browser pop-up blockers.
Try to use ethernet or network cable directly to your device; avoid using a mobile hotspot and wireless network.
Make sure the user account you’re using to log into your computer has local administrative permissions. For help with enabling administrative permissions, see documentation for Windows and Mac.
Test on a personal computer rather than a work computer, if possible, as work computers often contain software that prevents OnVUE software from launching.
Make sure your security software won’t block the execution of JavaScript, Adobe Air applications, or Adobe Flash Player extensions.
For your reference, please visit our public document About online exams with Pearson VUE | Microsoft Learn and for video streaming and requirements, kindly review the OnVue Technical Requirements for the Candidate which also provide required configurations with your device.
If your network speed and device already meet the minimum requirements, I highly recommend contacting Pearson VUE immediately as they have direct access to your appointment and can provide recommendations as to why you're receiving an error. You can reach them out using the link below and select your correct region:
https://home.pearsonvue.com/microsoft/contact
Please note that they typically respond within 3-5 business days. If you already have an open ticket with Pearson VUE, I would also appreciate if you could provide us with the Case ID through Private Message along with additional information needed for us to locate your profile and check the status of your exam.
I look forward to your response. Please note that if no response is received after two business days, the case will be closed and locked. After the case is locked, we will no longer be able to respond, even through Private Messages. Thank you.
Warm regards,